JP7171334B2 - manual transmission - Google Patents

Description

TECHNICAL FIELD The present invention relates to a manual transmission mounted on a vehicle.

Conventionally, a manual transmission mounted on a vehicle includes a transmission gear mechanism, a switching mechanism for switching the transmission gear mechanism, and a transmission case housing the transmission gear mechanism and the switching mechanism. Patent Document 1 discloses an example of this type of manual transmission.

In the manual transmission disclosed in Patent Document 1, the transmission case is divided in two by a deep main body portion and a lid portion that closes an opening of the main body portion. The body portion and the lid portion are fastened with bolts while housing the transmission gear mechanism and the switching mechanism. One end of the shaft group of the speed change gear mechanism and the switching mechanism is pivotally supported (rotatably supported) by the cover and the other end by the main body. In the configuration of Patent Document 1, the shaft groups of the transmission gear mechanism and the switching mechanism extend along the opening direction of the main body (see FIG. 4 of Patent Document 1).

JP 2014-137107 A

By the way, in the configuration of Patent Document 1, both the shift shaft for performing the shift operation to slide the shaft of the switching mechanism and the select shaft for performing the select operation to rotate the shaft of the switching mechanism are supported by the main body. there is The shift shaft is configured to engage with the switching mechanism from a direction intersecting the axis of the switching mechanism. This is because the shift shaft slides the shaft of the switching mechanism and its operating direction is along the axial direction of the switching mechanism. Therefore, the direction in which the shift shaft is engaged with the switching mechanism intersects the opening direction of the main body (the direction in which the main body is closed with the lid).

For this reason, in the assembly work of the manual transmission in Patent Document 1, the main body is placed on the cover while one end side of the shaft group of the transmission gear mechanism and the switching mechanism is supported by the cover, and the main body and the cover are bolted together. After that, the shift shaft and the switching mechanism are engaged, or the shift shaft and the switching mechanism are connected with one end side of the shaft group of the transmission gear mechanism and the switching mechanism supported by the main body. After that, the lid portion is put on and the body portion and the lid portion are bolted.

According to the former work procedure, the shift shaft must be engaged with the switching mechanism without directly looking at the engagement point. For this reason, the engaging work is difficult, and there is room for examination in terms of assembly workability.

In addition, since the shift shaft is engaged with the switching mechanism after the main body and the lid are bolted together, a separate component is required to prevent the shift shaft from slipping out, and this has left room for consideration in terms of cost. .

According to the latter work procedure, since the transmission gear mechanism and the switching mechanism are inserted into the deep main body, the shift shaft is engaged with the switching mechanism in a state where the engagement point is difficult to see because it is hidden by the transmission gear mechanism or the like. must let In this case as well, the engaging work is difficult, and there is still room for examination in terms of assembly workability.

It is a technical object of the present invention to provide an improved manual transmission in consideration of the above situation.

The present invention includes a transmission gear mechanism, a switching mechanism for switching the transmission gear mechanism, and a transmission case that houses the transmission gear mechanism and the switching mechanism, wherein the transmission case includes a body portion, The body is divided into two parts with a lid that closes the opening of the body. A manual transmission extending along the opening direction of the transmission, comprising a shift shaft for performing a shift operation to slide the shaft of the switching mechanism, and a select shaft for performing a select operation to rotate the shaft of the switching mechanism. , the select shaft is supported by the main body, and the shift shaft is supported by the lid.

In the manual transmission of the present invention, the shift shaft and the select shaft extend in a direction that intersects the axis of the switching mechanism, and the shift shaft engages the switching mechanism from the direction that intersects the axis of the switching mechanism. On the other hand, the select shaft may be configured to engage with the switching mechanism from the axial direction of the switching mechanism.

According to the manual transmission of the present invention, the select shaft for performing the select operation to rotate the shaft of the switching mechanism is pivotally supported on the main body, while the shift shaft for performing the shift operation to slide the shaft of the switching mechanism is attached to the lid. Therefore, before connecting the main body and the cover, the engaging operation between the shift shaft and the switching mechanism is performed with one end side of the shaft group of the speed change gear mechanism and the switching mechanism supported by the cover. It can be executed while watching the work. Therefore, assembly workability is improved. In addition, since the conventionally required parts for preventing the shift shaft from slipping out can be eliminated, the cost can be reduced.

1 is a schematic plan view of a manual transmission; FIG. 1 is a schematic perspective view of a manual transmission; FIG. 1 is a skeleton diagram showing a power transmission system of a manual transmission; FIG. FIG. 5 is a schematic plan view showing a select operation and a shift operation in floor shift; 4 is a perspective view of the transmission gear mechanism and the switching mechanism with the main body and the lid separated; FIG. FIG. 4 is a plan view of the transmission gear mechanism and the switching mechanism in a state where the main body and the lid are separated; FIG. 4 is a side view of the transmission gear mechanism and the switching mechanism with the main body and the lid separated; 4 is an enlarged perspective view showing the relationship between the transmission gear mechanism and the switching mechanism; FIG.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, when using terms indicating specific directions and positions (e.g., “left and right”, “up and down”, etc.) as necessary, the left side of the vehicle in which the engine E and the manual transmission 1 are mounted will be referred to as the forward direction. These are referred to simply as the left side and the right side in the forward direction as the right side. These terms are used for convenience of explanation and do not limit the technical scope of the present invention. 1 to 8 all show a state in which the floor shifter 9 in the vehicle is positioned at a neutral position (neutral position).

As shown in FIGS. 1 and 2, the manual transmission 1 of the embodiment has five forward speeds and one reverse speed. is attached to the engine E so as to be positioned on the left side of the As shown in FIG. 3 and subsequent figures, the manual transmission 1 includes a transmission gear mechanism 2 for shifting the output from the engine E, a switching mechanism 3 for switching the transmission gear mechanism 2, and the transmission gear mechanism 2 and the switching mechanism 3. and a transmission case 4 for housing.

The transmission case 4 is divided in two by a main body portion 5 having a large depth and a cover portion 6 that closes the opening of the main body portion 5 . Although detailed illustration is omitted, the body portion 5 is open rightward. The lid portion 6 is open toward both the left and right sides. A partition wall is formed in the lid portion 6 to divide the inside into right and left. Accordingly, the lid portion 6 is formed with a left opening and a right opening having the partition wall as a bottom.

A part of the transmission gear mechanism 2 and the switching mechanism 3 are accommodated in the left opening of the lid portion 6 , and most of the transmission gear mechanism 2 and the switching mechanism 3 are accommodated in the main body portion 5 . In the embodiment, the differential gear mechanism 7 is also accommodated inside the transmission case 4 (specifically, inside the left opening of the lid portion 6). That is, the transmission case 4 of the embodiment is a so-called transaxle case that accommodates the transmission gear mechanism 2 and the differential gear mechanism 7 therein. That is, the manual transmission 1 of the embodiment is adopted as a front-wheel drive type. The body portion 5 and the lid portion 6 (on the left opening side) are bolted together with the transmission gear mechanism 2, the switching mechanism 3 and the differential gear mechanism 7 accommodated therein. A shaft group of the transmission gear mechanism 2 and the switching mechanism 3 extends along the opening direction of the body portion 5 (the fastening direction of the body portion 5 and the lid portion 6, in the embodiment, the left-right direction).

A main clutch CL that connects and disconnects power transmission from the engine E to the transmission gear mechanism 2 is accommodated in the right opening of the lid portion 6 . A shift input shaft 10 (details of which will be described later) of the shift gear mechanism 2 rotatably penetrates a partition wall inside the lid portion 6 . An engine output shaft SH (crankshaft) projecting from the engine E is connected to a shift input shaft 10 projecting into the right opening via a main clutch CL. The lid portion 6 (on the right opening side) is bolted to the engine E while accommodating the main clutch CL.

The power of the engine E is transmitted from the engine output shaft SH to the transmission gear mechanism 2 and appropriately changed in speed.

Next, operation patterns of the floor shifter 9 will be described. As shown in FIG. 4, the floor shifter 9 has one select groove extending in the select direction when the width direction (horizontal direction) of the vehicle is the select direction, and the direction intersecting the select direction (the longitudinal direction of the vehicle) is the shift direction. 40 and a plurality of shift grooves 41 to 46 extending in the shift direction. A first-speed shift groove 41, a third-speed shift groove 43, and a fifth-speed shift groove 45 are positioned in this order from the left side of the select groove 40 on the front side of the select groove 40. A speed shift groove 44 and a reverse shift groove 46 are located. The sets of the first-speed shift groove 41 and the second-speed shift groove 42 are arranged in the same straight line in the shift direction. The same applies to the set of the 3rd speed shift groove 43 and the 4th speed shift groove 44 and the set of the 5th speed shift groove 45 and the reverse shift groove 46 . A completely neutral position of the floor shifter 9 is set at a position where the select groove 40 intersects with the 3rd speed shift groove 43 and the 4th speed shift groove 44 .

Next, the transmission gear mechanism 2 of the manual transmission 1 will be described. As shown in detail in FIG. 3, the transmission gear mechanism 2 accommodated in the transmission case 4 includes a transmission input shaft 10 to which the power of the engine E is input, and a transmission input shaft 10 extending parallel to the transmission input shaft 10 and differentially acting. and a speed change output shaft 20 that transmits power to the gear mechanism 7 . The transmission input shaft 10 and the transmission output shaft 20 are provided with a plurality of forward gear trains G1 to G5 for transmitting power from the transmission input shaft 10 to the transmission output shaft 20, and a reverse gear train GR. Each of the forward gear trains G1 to G5 is composed of two gears that are in constant mesh with each other. The reverse gear train GR is composed of three gears that mesh with each other when the vehicle is moving backward. In the transmission gear mechanism 2 of the embodiment, from the engine E side, there are a first gear train G1, a reverse gear train GR, a second gear train G2, a third gear train G3, a fourth gear train G4, and a fifth gear train G5. They are in order.

A first-speed gear train G1 and a second-speed gear train G2 are respectively a first-speed input gear 11 and a second-speed input gear 12 fixed to a transmission input shaft 10, and a first-speed output gear fitted to a transmission output shaft 20 so as to be relatively rotatable. 21 and second speed output gear 22 . The third-speed gear train G3 to fifth-speed gear train G5 are composed of a third-speed input gear 13 to a fifth-speed input gear 15 fitted on the transmission input shaft 10 so as to be relatively rotatable, and a third-speed output gear fixed to the transmission output shaft 20. It has a gear 23 to a fifth speed output gear 25 . The reverse gear train GR includes a reverse input gear 17 fixed to the speed change input shaft 10, a reverse output gear 27 fitted on the speed change output shaft 20 so as to be non-rotatable and slidable in the axial direction, the speed change input shaft 10 and the speed change gear. A reverse idle gear 37 is rotatably and axially slidably fitted on a reverse idle shaft 30 extending parallel to the output shaft 20 . An output gear 28 that always meshes with the ring gear 8 of the differential gear mechanism 7 is fixed to the end (right end) of the speed change output shaft 20 near the engine E. As shown in FIG.

A low-speed slider 51 is fitted between the first-speed output gear 21 and the second-speed output gear 22 on the speed change output shaft 20 so as to be axially slidable and non-rotatable. The action of the low-speed slider 51 selectively connects the first-speed output gear 21 and the second-speed output gear 22 to the speed change output shaft 20 . Between the third speed input gear 13 and the fourth speed input gear 14 on the speed change input shaft 10, a medium speed slider 52 is fitted so as to be axially slidable and non-rotatable relative to each other. The third-speed input gear 13 and the fourth-speed input gear 14 are alternatively connected to the shift input shaft 10 by the action of the intermediate speed slider 52 . A high-speed slider 53 is fitted on the transmission input shaft 10 at a position farther from the engine E than the fifth-speed input gear 15 so as to be axially slidable and not relatively rotatable. The action of the high-speed slider 53 connects or disconnects the fifth speed input gear 15 with the shift input shaft 10 .

Relative rotation is possible by sliding the sliders 51-53 along the shift output shaft 20 or the shift input shaft 10 based on the forward shift operation of the floor shift 9 (operation in the longitudinal direction along the shift grooves 41-45). The output gears 21, 22 or the input gears 13-15 are fixed to the speed change output shaft 20 or the speed change input shaft 10, and the corresponding forward speed gear trains G1-G5 are in the power connection state.

Specifically, when the low-speed slider 51 slides to the engine E side (right side), the first speed output gear 21 is connected to the speed change output shaft 20 . As a result, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the speed change input shaft 10, the first speed input gear 11, the first speed output gear 21, the speed change output shaft 20, and the output gear 28. front wheels are rotationally driven in the first forward speed state. When the low speed slider 51 slides away from the engine E (to the left), the second speed output gear 22 is connected to the speed change output shaft 20 . As a result, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the speed change input shaft 10, the second speed input gear 12, the second speed output gear 22, the speed change output shaft 20, and the output gear 28. front wheels are rotationally driven in the second forward speed state.

When the medium speed slider 52 slides toward the engine E, the third speed input gear 13 is connected to the shift input shaft 10 . As a result, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the speed change input shaft 10, the third speed input gear 13, the third speed output gear 23, the speed change output shaft 20, and the output gear 28. The front wheels of are rotationally driven in the forward third speed state. When the medium speed slider 52 slides away from the engine E, the fourth speed input gear 14 is connected to the shift input shaft 10 . As a result, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the speed change input shaft 10, the fourth speed input gear 14, the fourth speed output gear 24, the speed change output shaft 20, and the output gear 28. front wheels are rotationally driven in the forward four-speed state.

When the high-speed slider 53 slides toward the engine E, the fifth speed input gear 15 is connected to the shift input shaft 10 . As a result, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the speed change input shaft 10, the fifth speed input gear 15, the fifth speed output gear 25, the speed change output shaft 20, and the output gear 28. The front wheels of the are driven to rotate in the fifth forward speed state.

A reverse output gear 27 forming a reverse gear train GR is attached to a low-speed slider 51 . By sliding the reverse idle gear 37 away from the engine E along the reverse idle shaft 30 based on the reverse shift operation (operation along the reverse shift groove 46) of the floor shifter 9, the reverse idle gear 37 receives the reverse input. It meshes with both the gear 17 and the reverse output gear 27 . As a result, the reverse gear train GR enters the power connection state. That is, the power of the engine E is transmitted to the differential gear mechanism 7 via the main clutch CL, the shift input shaft 10, the reverse input gear 17, the reverse idle gear 37, the reverse output gear 27, the shift output shaft 20, and the output gear 28. , the left and right front wheels are rotationally driven in reverse.

Next, the switching mechanism 3 of the manual transmission 1 will be explained. As shown in FIGS. 5 to 8, the switching mechanism 3 in the transmission case 4 includes a low-medium speed operation shaft 61 extending parallel to the speed change input shaft 10, the speed change output shaft 20 and the reverse idle shaft 30, and a high speed reverse operation shaft 61. A shaft 62 is provided. Both the low-medium speed operation shaft 61 and the high-speed reverse operation shaft 62 are supported in the transmission case 4 so as to be slidable in the axial direction. In the embodiment, one end side (right end side) of the low/medium speed operation shaft 61 and the high speed reverse operation shaft 62 is axially slidably supported by the partition wall of the lid portion 6, and the low/medium speed operation shaft 61 and the high speed reverse operation shaft 61 are supported by the partition wall of the lid portion 6 so as to be axially slidable. The other end side (left end side) of the shaft 62 is supported by the inner wall of the body portion 5 so as to be slidable in the axial direction.

A low-speed fork 63 engaged with the low-speed slider 51 and a medium-speed fork 64 engaged with the medium-speed slider 52 are axially slidably fitted to the low-medium speed operation shaft 61 . A high-speed fork 65 that engages the high-speed slider 53 and a reverse fork 66 that slides the reverse idle gear 37 are fixed to the high-speed reverse operation shaft 62 . Between the low-speed fork 63 and the medium-speed fork 64 on the low-medium speed operation shaft 61, a selection arm 67 for alternatively selecting the low-speed fork 63, the medium-speed fork 64 or the reverse fork 66, and the selection arm 67 are provided. A guide lever 68 that rotates about the low-to-medium speed operating shaft 61 is attached.

The selection arm 67 is fixed to the low/medium speed operation shaft 61 and is rotatable together with the low/medium speed operation shaft 61 . The guide lever 68 is fitted so as to be slidable relative to the low/medium speed operating shaft 61 and rotatable around the low/medium speed operating shaft 61 . The guide lever 68 cannot slide along the low/medium speed operation shaft 61 . The low-speed fork 63, the medium-speed fork 64, and the reverse fork 66 are provided with engagement pieces 69-71, respectively, with which the tip side of the selection arm 67 can be engaged.

By rotating the guide lever 68 about the low/medium speed operating shaft 61 , the selection arm 67 rotates about the low/medium speed operating shaft 61 to engage the low speed engaging piece 69 of the low speed fork 63 and the medium speed fork 64 . It engages with either the medium speed engagement piece 70 or the reverse movement engagement piece 71 of the reverse movement fork 66 . As a result, the low-speed fork 63, the medium-speed fork 64, and the reverse fork 66 are alternatively connected to the selection arm 67 and thus to the low-to-medium speed operation shaft 61. In the embodiment, when the selection arm 67 selects one of the low-speed fork 63, the medium-speed fork 64, or the reverse fork 66, the action of the guide lever 68 causes the non-selected fork to move to the low-medium speed operation shaft 61 or the high-speed fork. It is configured to prevent sliding movement along the reverse operation shaft 62 .

A shift sleeve 72 with a locking groove 73 is fixed to a portion closer to the engine E than the low speed fork 63 on the low and medium speed operation shaft 61 . The shift sleeve 72 and the low/medium speed operation shaft 61 are configured to slide axially in association with the rotation of the shift arm 81, which will be described later.

When the guide lever 68 is rotated around the low/medium speed operation shaft 61 based on the select operation of the floor shifter 9 (operation in the left-right direction along the select groove 40), the select arm 67 is lowered in conjunction with the guide lever 68. Rotating around the medium speed operation shaft 61 , the selection arm 67 selects the low speed engagement piece 69 of the low speed fork 63 , the medium speed engagement piece 70 of the medium speed fork 64 or the reverse engagement piece 71 of the reverse fork 66 . unilaterally engage. As a result, the low-speed fork 63, the medium-speed fork 64, and the reverse fork 66 are alternatively connected to the selection arm 67 and thus to the low-to-medium speed operation shaft 61.

When the shift sleeve 72 and thus the low/middle speed operation shaft 61 are slid in the axial direction based on the forward shift operation of the floor shifter 9, the sliders 51 to 53 corresponding to the selected forks 63, 64, 66 are moved to shift output shafts. 20 or the transmission input shaft 10, and the corresponding forward gear train G1-G5 is brought into power engagement as described above.

Specifically, when the floor shifter 9 is operated to the position where the select groove 40 intersects the first-speed shift groove 41 and second-speed shift groove 42 , the selection arm 67 rotated together with the guide lever 68 selects the low-speed fork 63 . Then, when the floor shifter 9 is operated to shift to 1st speed, the shift sleeve 72 and thus the low/medium speed operation shaft 61 are slid to the engine E side (right side), and accordingly the low speed fork 63 and thus the low speed slider 51 are moved to the engine E side. slide to move. As a result, the first speed output gear 21 is connected to the transmission output shaft 20, and the left and right front wheels are rotationally driven in the forward first speed state, as described above.

When the floor shifter 9 is operated to shift to second speed with the low speed fork 63 selected, the shift sleeve 72 and the low and medium speed operation shaft 61 are slid away from the engine E (to the left). The low-speed slider 51 slides away from the engine E. As a result, the second speed output gear 22 is connected to the transmission output shaft 20, and the left and right front wheels are rotationally driven in the forward second speed state, as described above.

When the floor shifter 9 is operated to a position (completely neutral position) where the select groove 40 and the third-speed shift groove 43 and the fourth-speed shift groove 44 intersect, the selection arm 67 rotated together with the guide lever 68 selects the medium-speed fork 64. . Then, when the floor shifter 9 is operated to shift to 3rd speed, the shift sleeve 72 and thus the low/medium speed operation shaft 61 are slid toward the engine E side, and accordingly the middle speed fork 64 and thus the middle speed slider 52 are slid toward the engine E side. Moving. As a result, the third speed input gear 13 is connected to the transmission input shaft 10, and the left and right front wheels are rotationally driven in the forward third speed state, as described above.

When the floor shifter 9 is operated to shift to 4th gear with the medium speed fork 64 selected, the shift sleeve 72 and thus the low/medium speed operation shaft 61 slide away from the engine E, and accordingly the medium speed fork 64 and thus the medium speed fork 64 and the middle speed fork. The speed slider 52 slides away from the engine E. As a result, the fourth-speed input gear 14 is connected to the transmission input shaft 10, and the left and right front wheels are rotationally driven in the forward fourth-speed state, as described above.

When the floor shifter 9 is operated to the position where the select groove 40 intersects the fifth gear shift groove 45 and the reverse shift groove 46 , the select arm 67 rotated together with the guide lever 68 selects the reverse fork 66 . Then, when the floor shifter 9 is operated to shift to 5th speed, the shift sleeve 72 and the low/middle speed operation shaft 61 are slid toward the engine E side. The slider 53 slides toward the engine E side. As a result, the fifth speed input gear 15 is connected to the transmission input shaft 10, and the left and right front wheels are rotationally driven in the forward fifth speed state, as described above.

In this case, the reverse fork 66 is interlocked with the reverse idle gear 37 via a flexible arm 74 . Although details are omitted, the flexible arm 74 moves the reverse idle gear 37 away from the engine E along the reverse idle shaft 30 only when the reverse fork 66 and the high-speed reverse operation shaft 62 slide away from the engine E. It is configured to be slidably moved to the Therefore, when the reverse fork 66 and the high-speed reverse operation shaft 62 slide toward the engine E, the flexible arm 74 prevents the reverse idle gear 37 from sliding.

When the floor shifter 9 is operated to shift backward while the reverse fork 66 is selected, the shift sleeve 72 and the low/medium speed operating shaft 61 slide away from the engine E, and the reverse fork 66 moves away from the engine E accordingly. slide to the side. As a result, the reverse idle gear 37 slides away from the engine E along the reverse idle shaft 30 via the flexible arm 74 , and the reverse idle gear 37 moves to both the reverse input gear 17 and the reverse output gear 27 . As described above, the left and right front wheels are driven to rotate in reverse.

The transmission case 4 includes a shift shaft 76 for performing a shift operation to slide the low/medium speed operation shaft 61 corresponding to the shaft of the switching mechanism 3, and a select shaft for performing a select operation to rotate the low/medium speed operation shaft 61. 75. In the embodiment, the shift shaft 76 and the select shaft 75 are rotatably supported (pivotally supported) on the upper surface of the transmission case 4 in a vertical posture extending in a direction intersecting the low/middle speed operation shaft 61 . there). In this case, the select shaft 75 is rotatably supported on the upper surface of the body portion 5 , while the shift shaft 76 is rotatably supported on the upper surface of the lid portion 6 on the left opening side.

A select outer lever 77 for rotating the select shaft 75 is fixed to the end of the select shaft 75 outside the main body 5 . A shift outer lever 78 for rotating the shift shaft 76 is fixed to the end of the shift shaft 76 outside the lid portion 6 . The select outer lever 77 and the shift outer lever 78 are interlocked with the floor shifter 9 via a link mechanism (not shown) including a link mechanism and a wire. By operating the floor shift 9 in the select direction, the select shaft 75 rotates via the linkage mechanism and the select outer lever 77, and by operating the floor shift 9 in the shift direction, the linkage mechanism and the shift outer lever 78 are rotated. The shift shaft 76 is configured to rotate through the shaft.

The shift shaft 76 is configured to engage with the switching mechanism 3 from a direction intersecting the low/middle speed operation shaft 61 . That is, a shift arm 81 that engages with the locking groove portion 73 of the shift sleeve 72 is attached to the tip side of the shift shaft 76 in the lid portion 6 . The shift arm 81 is fitted into the locking groove 73 of the shift sleeve 72 from above. By rotating the shift arm 81 about the shift shaft 76, the shift sleeve 72 and the low/medium speed operation shaft 61 slide axially.

The select shaft 75 is configured to engage with the switching mechanism 3 from the axial direction of the low and medium speed operation shaft 61 . That is, the guide lever 68 is formed with a U-shaped engaging recess 79 that opens upward and in the axial direction of the low-to-medium speed operating shaft 61 , while the selection shaft 75 is formed on the protruding end side of the main body 5 . , a select arm 80 that engages with the locking recess 79 of the guide lever 68 is attached. The select arm 80 moves the guide lever 68 in a posture along the axial direction of the low-to-medium speed operation shaft 61, that is, the opening direction of the main body portion 5 (the fastening direction between the main body portion 5 and the lid portion 6, in the embodiment, the lateral direction). It is inserted into the locking recess 79 . By rotating the select arm 80 about the select shaft 75 , the guide lever 68 and thus the select arm 67 are configured to rotate about the low/medium speed operation shaft 61 .

Although details are omitted, in the left opening of the lid 6, the shift shaft 76 is placed at a neutral position in the shift direction (the position when the floor shift 9 is in the select groove 40; A shift detent mechanism is provided to hold it in the non-sliding position in either direction. The shift shaft 76 is held at the neutral position in the shift direction even when the manual transmission 1 is assembled, and the shift arm 81 and the engagement groove 73 of the shift sleeve 72 can be smoothly engaged. .

In the main body 5, the select shaft 75 is positioned at a completely neutral position (the position where the floor shifter 9 intersects the select groove 40 with the third-speed shift groove 43 and the fourth-speed shift groove 44; A select detent mechanism is provided to hold the detent in the non-rotated position 61). The select shaft 75 is held at the completely neutral position even during the assembly work of the manual transmission 1, and the select arm 80 and the engaging recess 79 of the guide lever 68 can be smoothly engaged.

According to the above configuration, the select shaft 75 is rotatably supported (rotatably supported) by the main body portion 5, while the shift shaft 76 is rotatably supported (rotatably supported) by the lid portion 6. ), during assembly work of the manual transmission 1, prior to connecting the body portion 5 and the cover portion 6, the shafts 10, 20, 30, 61, 62 of the transmission gear mechanism 2 and the switching mechanism 3 are assembled. In a state in which one end side is supported by the lid portion 6 (a state in which the units of the transmission gear mechanism 2 and the switching mechanism 3 are supported by the lid portion 6), the shift shaft 76 (shift arm 81) and the switching mechanism 3 (shift sleeve 72) are arranged. can be performed while visually checking the engagement work with the locking groove portion 73). Therefore, assembly workability is improved. In addition, since the shift shaft 76 can be attached to the lid portion 6 in advance before connecting the main body portion 5 and the lid portion 6, there is no need for a component for preventing the shift shaft 76 from slipping off, which was conventionally required, and cost can be reduced. I can plan.

Further, when connecting the body portion 5 and the lid portion 6, the engagement between the select shaft 75 and the switching mechanism 3 (locking recess portion 79 of the guide lever 68) should be in the axial direction of the low and medium speed operation shaft 61, i.e., the body portion. 5 (the fastening direction between the body portion 5 and the lid portion 6, in the embodiment, the left-right direction). The switching mechanism 3 (locking concave portion 79 of the guide lever 68) is engaged in a one-touch manner, so that the positioning work and the assembling work are extremely easy. Therefore, it can further contribute to the improvement of assembly workability.

The configuration of each part in the present invention is not limited to the illustrated embodiment, and various modifications are possible without departing from the gist of the present invention. For example, although the manual transmission 1 of the embodiment is adopted for a front-wheel drive type, it is not limited to this, and may be adopted for a rear-wheel drive type or a four-wheel drive type. is also possible.

E Engine 1 Manual Transmission 2 Transmission Gear Mechanism 3 Switching Mechanism 4 Transmission Case 5 Main Body 6 Lid 9 Floor Shift 10 Transmission Input Shaft 20 Transmission Output Shaft 30 Reverse Idle Shaft 61 Low/Medium Speed Operation Shaft 62 High Speed Reverse Operation Shaft 63 Low-speed fork 64 Medium-speed fork 65 High-speed fork 66 Reverse fork 67 Selection arm 68 Guide lever 72 Shift sleeve 73 Locking groove 74 Flexible arm 75 Select shaft 76 Shift shaft 79 Lock recess 80 Select arm 81 Shift arm

Claims (2)

A transmission gear mechanism, a switching mechanism that performs switching operation of the transmission gear mechanism, and a transmission case that houses the transmission gear mechanism and the switching mechanism, wherein the transmission case includes a body portion and the body portion of the transmission case. The main body is set deeper than the lid, and the shaft groups of the transmission gear mechanism and the switching mechanism extend in the opening direction of the main body. a manual transmission extending along
A shift shaft for performing a shift operation for sliding the shaft of the switching mechanism and a select shaft for performing a select operation for rotating the shaft of the switching mechanism, the select shaft being pivotally supported by the main body, a shaft supported by the lid;
manual transmission. the shift shaft and the select shaft extend in a direction intersecting the axis of the switching mechanism;
The shift shaft engages the switching mechanism in a direction intersecting the axis of the switching mechanism, while the select shaft engages the switching mechanism in an axial direction of the switching mechanism.
A manual transmission as claimed in claim 1.

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